Apple will introduce not one but two new iPhone models come September, suggests Deutsche Bank's Chris Whitmore. The analyst argues that while there may be a normal flagship iPhone, "with Nokia and RIMM struggling, the time is right" to attack the mid-range smartphone market with a cheaper device, nicknamed the iPhone 4S. He classifies the mid-range as between $300 and $500, but proposes the 4S as shipping unlocked at $349, and having the option of a prepaid voice plan.